:root {
  color-scheme: light dark;
  --accent: #534ab7;
  --text: #1c1c1e;
  --secondary: #5c5c66;
  --canvas: #f7f6fb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #a59ef0;
    --text: #f2f2f7;
    --secondary: #b4b4be;
    --canvas: #121116;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--canvas);
  color: var(--text);
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main { max-width: 30rem; width: 100%; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 0.75rem; }
p { margin: 0 0 1rem; }
.secondary { color: var(--secondary); }
a { color: var(--accent); }
.button {
  display: block;
  margin: 1.5rem 0 1rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--canvas);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}
[hidden] { display: none; }